diff options
| author | yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-07-02 09:09:00 +0000 |
|---|---|---|
| committer | yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-07-02 09:09:00 +0000 |
| commit | c3902377a94850795450186d9b4b2bc3007d83be (patch) | |
| tree | adc8ff784a17f85918611259a0242679d1803d30 /IntelFrameworkModulePkg/Bus/Isa/IsaBusDxe/IsaIo.c | |
| parent | 92627141817c5f794db66c8937c7453bbff4c302 (diff) | |
| download | edk2-platforms-c3902377a94850795450186d9b4b2bc3007d83be.tar.xz | |
Add DxeBootScriptLibNull in IntelFrameworkPkg.
Add IsaBusDxe in IntelFrameworkModulePkg.
Add Pcat.h in "IntelFrameworkModulePkg/IndustryStandard"
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2948 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'IntelFrameworkModulePkg/Bus/Isa/IsaBusDxe/IsaIo.c')
| -rw-r--r-- | IntelFrameworkModulePkg/Bus/Isa/IsaBusDxe/IsaIo.c | 1646 |
1 files changed, 1646 insertions, 0 deletions
diff --git a/IntelFrameworkModulePkg/Bus/Isa/IsaBusDxe/IsaIo.c b/IntelFrameworkModulePkg/Bus/Isa/IsaBusDxe/IsaIo.c new file mode 100644 index 0000000000..1a3497dfda --- /dev/null +++ b/IntelFrameworkModulePkg/Bus/Isa/IsaBusDxe/IsaIo.c @@ -0,0 +1,1646 @@ +/*++
+
+Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved. <BR>
+This software and associated documentation (if any) is furnished
+under a license and may only be used or copied in accordance
+with the terms of the license. Except as permitted by such
+license, no part of this software or documentation may be
+reproduced, stored in a retrieval system, or transmitted in any
+form or by any means without the express written consent of
+Intel Corporation.
+
+
+Module Name:
+
+ IsaIo.c
+
+Abstract:
+
+ The implementation for EFI_ISA_IO_PROTOCOL.
+
+--*/
+
+//
+// Include common header file for this module.
+//
+#include "InternalIsaIo.h"
+
+#include <IndustryStandard/Pcat.h>
+
+//
+// Driver Support Global Variables
+//
+EFI_ISA_IO_PROTOCOL IsaIoInterface = {
+ {
+ IsaIoMemRead,
+ IsaIoMemWrite
+ },
+ {
+ IsaIoIoRead,
+ IsaIoIoWrite
+ },
+ IsaIoCopyMem,
+ IsaIoMap,
+ IsaIoUnmap,
+ IsaIoAllocateBuffer,
+ IsaIoFreeBuffer,
+ IsaIoFlush,
+ NULL,
+ 0,
+ NULL
+};
+
+static EFI_ISA_DMA_REGISTERS DmaRegisters[8] = {
+ {
+ 0x00,
+ 0x87,
+ 0x01
+ },
+ {
+ 0x02,
+ 0x83,
+ 0x03
+ },
+ {
+ 0x04,
+ 0x81,
+ 0x05
+ },
+ {
+ 0x06,
+ 0x82,
+ 0x07
+ },
+ {
+ 0x00,
+ 0x00,
+ 0x00
+ }, // Channel 4 is invalid
+ {
+ 0xC4,
+ 0x8B,
+ 0xC6
+ },
+ {
+ 0xC8,
+ 0x89,
+ 0xCA
+ },
+ {
+ 0xCC,
+ 0x8A,
+ 0xCE
+ },
+};
+
+EFI_STATUS
+ReportErrorStatusCode (
+ EFI_STATUS_CODE_VALUE Code
+ )
+/*++
+
+Routine Description:
+
+ report a error Status code of PCI bus driver controller
+
+Arguments:
+
+ Code - The error status code.
+
+Returns:
+
+ EFI_SUCCESS - Success to report status code.
+
+
+--*/
+{
+ return REPORT_STATUS_CODE (
+ EFI_ERROR_CODE | EFI_ERROR_MINOR,
+ Code
+ );
+}
+
+//
+// Driver Support Functions
+//
+
+EFI_STATUS
+InitializeIsaIoInstance (
+ IN ISA_IO_DEVICE *IsaIoDevice,
+ IN EFI_ISA_ACPI_RESOURCE_LIST *IsaDeviceResourceList
+ )
+/*++
+
+Routine Description:
+
+ Initializes an ISA I/O Instance
+
+Arguments:
+
+ IsaIoDevice - The iso device to be initialized.
+ IsaDeviceResourceList - The resource list.
+
+Returns:
+
+ EFI_SUCCESS - Initial success.
+
+--*/
+{
+ //
+ // Initializes an ISA I/O Instance
+ //
+ CopyMem (
+ &IsaIoDevice->IsaIo,
+ &IsaIoInterface,
+ sizeof (EFI_ISA_IO_PROTOCOL)
+ );
+
+ IsaIoDevice->IsaIo.ResourceList = IsaDeviceResourceList;
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoIoRead (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
+ IN UINT32 Offset,
+ IN UINTN Count,
+ IN OUT VOID *Buffer
+ )
+/*++
+
+Routine Description:
+
+ Performs an ISA I/O Read Cycle
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Width - Signifies the width of the I/O operation.
+ Offset - The offset in ISA I/O space to start the I/O operation.
+ Count - The number of I/O operations to perform.
+ Buffer - The destination buffer to store the results
+
+Returns:
+
+ EFI_SUCCESS - The data was read from the device sucessfully.
+ EFI_UNSUPPORTED - The Offset is not valid for this device.
+ EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
+ EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
+
+--*/
+{
+ EFI_STATUS Status;
+ ISA_IO_DEVICE *IsaIoDevice;
+
+ IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
+
+ //
+ // Verify Isa IO Access
+ //
+ Status = IsaIoVerifyAccess (
+ IsaIoDevice,
+ IsaAccessTypeIo,
+ Width,
+ Count,
+ &Offset
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Call PciIo->Io.Read
+ //
+ Status = IsaIoDevice->PciIo->Io.Read (
+ IsaIoDevice->PciIo,
+ (EFI_PCI_IO_PROTOCOL_WIDTH) Width,
+ EFI_PCI_IO_PASS_THROUGH_BAR,
+ Offset,
+ Count,
+ Buffer
+ );
+
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoIoWrite (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
+ IN UINT32 Offset,
+ IN UINTN Count,
+ IN OUT VOID *Buffer
+ )
+/*++
+
+Routine Description:
+
+ Performs an ISA I/O Write Cycle
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Width - Signifies the width of the I/O operation.
+ Offset - The offset in ISA I/O space to start the I/O operation.
+ Count - The number of I/O operations to perform.
+ Buffer - The source buffer to write data from
+
+Returns:
+
+ EFI_SUCCESS - The data was writen to the device sucessfully.
+ EFI_UNSUPPORTED - The Offset is not valid for this device.
+ EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
+ EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
+
+--*/
+{
+ EFI_STATUS Status;
+ ISA_IO_DEVICE *IsaIoDevice;
+
+ IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
+
+ //
+ // Verify Isa IO Access
+ //
+ Status = IsaIoVerifyAccess (
+ IsaIoDevice,
+ IsaAccessTypeIo,
+ Width,
+ Count,
+ &Offset
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Call PciIo->Io.Write
+ //
+ Status = IsaIoDevice->PciIo->Io.Write (
+ IsaIoDevice->PciIo,
+ (EFI_PCI_IO_PROTOCOL_WIDTH) Width,
+ EFI_PCI_IO_PASS_THROUGH_BAR,
+ Offset,
+ Count,
+ Buffer
+ );
+
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+WritePort (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN UINT32 Offset,
+ IN UINT8 Value
+ )
+/*++
+
+Routine Description:
+
+ Writes an 8 bit I/O Port
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Offset - The offset in ISA IO space to start the IO operation.
+ Value - The data to write port.
+
+Returns:
+
+ EFI_SUCCESS - Success.
+ EFI_INVALID_PARAMETER - Parameter is invalid.
+ EFI_UNSUPPORTED - The address range specified by Offset is not valid.
+ EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
+
+--*/
+{
+ EFI_STATUS Status;
+ ISA_IO_DEVICE *IsaIoDevice;
+
+ IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
+
+ //
+ // Call PciIo->Io.Write
+ //
+ Status = IsaIoDevice->PciIo->Io.Write (
+ IsaIoDevice->PciIo,
+ EfiPciIoWidthUint8,
+ EFI_PCI_IO_PASS_THROUGH_BAR,
+ Offset,
+ 1,
+ &Value
+ );
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ return Status;
+ }
+
+ gBS->Stall (50);
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+WriteDmaPort (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN UINT32 AddrOffset,
+ IN UINT32 PageOffset,
+ IN UINT32 CountOffset,
+ IN UINT32 BaseAddress,
+ IN UINT16 Count
+ )
+/*++
+
+Routine Description:
+
+ Writes I/O operation base address and count number to a 8 bit I/O Port.
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ AddrOffset - The address' offset.
+ PageOffset - The page's offest.
+ CountOffset - The count's offset.
+ BaseAddress - The base address.
+ Count - The number of I/O operations to perform.
+
+Returns:
+
+ EFI_SUCCESS - Success.
+ EFI_INVALID_PARAMETER - Parameter is invalid.
+ EFI_UNSUPPORTED - The address range specified by these Offsets and Count is not valid.
+ EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
+
+--*/
+{
+ EFI_STATUS Status;
+
+ Status = WritePort (This, AddrOffset, (UINT8) (BaseAddress & 0xff));
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (This, AddrOffset, (UINT8) ((BaseAddress >> 8) & 0xff));
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (This, PageOffset, (UINT8) ((BaseAddress >> 16) & 0xff));
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (This, CountOffset, (UINT8) (Count & 0xff));
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (This, CountOffset, (UINT8) ((Count >> 8) & 0xff));
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoUnmap (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN VOID *Mapping
+ )
+/*++
+
+Routine Description:
+
+ Unmaps a memory region for DMA
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Mapping - The mapping value returned from EFI_ISA_IO.Map().
+
+Returns:
+
+ EFI_SUCCESS - The range was unmapped.
+ EFI_DEVICE_ERROR - The data was not committed to the target system memory.
+
+--*/
+{
+ ISA_MAP_INFO *IsaMapInfo;
+
+ //
+ // Unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.
+ //
+ if (!FeaturePcdGet (PcdIsaBusSupportDma)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // See if the Map() operation associated with this Unmap() required a mapping
+ // buffer.If a mapping buffer was not required, then this function simply
+ // returns EFI_SUCCESS.
+ //
+ if (Mapping != NULL) {
+ //
+ // Get the MAP_INFO structure from Mapping
+ //
+ IsaMapInfo = (ISA_MAP_INFO *) Mapping;
+
+ //
+ // If this is a write operation from the Agent's point of view,
+ // then copy the contents of the mapped buffer into the real buffer
+ // so the processor can read the contents of the real buffer.
+ //
+ if (IsaMapInfo->Operation == EfiIsaIoOperationBusMasterWrite) {
+ CopyMem (
+ (VOID *) (UINTN) IsaMapInfo->HostAddress,
+ (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,
+ IsaMapInfo->NumberOfBytes
+ );
+ }
+ //
+ // Free the mapped buffer and the MAP_INFO structure.
+ //
+ gBS->FreePages (IsaMapInfo->MappedHostAddress, IsaMapInfo->NumberOfPages);
+ gBS->FreePool (IsaMapInfo);
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoFlush (
+ IN EFI_ISA_IO_PROTOCOL *This
+ )
+/*++
+
+Routine Description:
+
+ Flushes a DMA buffer
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+
+Returns:
+
+ EFI_SUCCESS - The buffers were flushed.
+ EFI_DEVICE_ERROR - The buffers were not flushed due to a hardware error.
+
+--*/
+{
+ EFI_STATUS Status;
+ ISA_IO_DEVICE *IsaIoDevice;
+
+ IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
+
+ //
+ // Call PciIo->Flush
+ //
+ Status = IsaIoDevice->PciIo->Flush (IsaIoDevice->PciIo);
+
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+IsaIoVerifyAccess (
+ IN ISA_IO_DEVICE *IsaIoDevice,
+ IN ISA_ACCESS_TYPE Type,
+ IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
+ IN UINTN Count,
+ IN OUT UINT32 *Offset
+ )
+/*++
+
+Routine Description:
+
+ Verifies access to an ISA device
+
+Arguments:
+
+ IsaIoDevice - The ISA device to be verified.
+ Type - The Access type. The input must be either IsaAccessTypeMem or IsaAccessTypeIo.
+ Width - Signifies the width of the memory operation.
+ Count - The number of memory operations to perform.
+ Offset - The offset in ISA memory space to start the memory operation.
+
+Returns:
+
+ EFI_SUCCESS - Verify success.
+ EFI_INVALID_PARAMETER - One of the parameters has an invalid value.
+ EFI_UNSUPPORTED - The device ont support the access type.
+
+--*/
+{
+ EFI_ISA_ACPI_RESOURCE *Item;
+ EFI_STATUS Status;
+
+ if (Width < EfiIsaIoWidthUint8 ||
+ Width >= EfiIsaIoWidthMaximum ||
+ Width == EfiIsaIoWidthReserved ||
+ Width == EfiIsaIoWidthFifoReserved ||
+ Width == EfiIsaIoWidthFillReserved
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // If Width is EfiIsaIoWidthFifoUintX then convert to EfiIsaIoWidthUintX
+ // If Width is EfiIsaIoWidthFillUintX then convert to EfiIsaIoWidthUintX
+ //
+ if (Width >= EfiIsaIoWidthFifoUint8 && Width <= EfiIsaIoWidthFifoReserved) {
+ Count = 1;
+ }
+
+ Width = (EFI_ISA_IO_PROTOCOL_WIDTH) (Width & 0x03);
+
+ Status = EFI_UNSUPPORTED;
+ Item = IsaIoDevice->IsaIo.ResourceList->ResourceItem;
+ while (Item->Type != EfiIsaAcpiResourceEndOfList) {
+ if ((Type == IsaAccessTypeMem && Item->Type == EfiIsaAcpiResourceMemory) ||
+ (Type == IsaAccessTypeIo && Item->Type == EfiIsaAcpiResourceIo)
+ ) {
+ if (*Offset >= Item->StartRange && (*Offset + Count * (UINT32)(1 << Width)) - 1 <= Item->EndRange) {
+ return EFI_SUCCESS;
+ }
+
+ if (*Offset >= Item->StartRange && *Offset <= Item->EndRange) {
+ Status = EFI_INVALID_PARAMETER;
+ }
+ }
+
+ Item++;
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoMemRead (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
+ IN UINT32 Offset,
+ IN UINTN Count,
+ IN OUT VOID *Buffer
+ )
+/*++
+
+Routine Description:
+
+ Performs an ISA Memory Read Cycle
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Width - Signifies the width of the memory operation.
+ Offset - The offset in ISA memory space to start the memory operation.
+ Count - The number of memory operations to perform.
+ Buffer - The destination buffer to store the results
+
+Returns:
+
+ EFI_SUCCESS - The data was read from the device successfully.
+ EFI_UNSUPPORTED - The Offset is not valid for this device.
+ EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
+ EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
+
+--*/
+{
+ EFI_STATUS Status;
+ ISA_IO_DEVICE *IsaIoDevice;
+
+ //
+ // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for
+ // ISA Bus Master.
+ //
+ // So we just return EFI_UNSUPPORTED for these functions.
+ //
+ if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
+
+ //
+ // Verify the Isa Io Access
+ //
+ Status = IsaIoVerifyAccess (
+ IsaIoDevice,
+ IsaAccessTypeMem,
+ Width,
+ Count,
+ &Offset
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Call PciIo->Mem.Read
+ //
+ Status = IsaIoDevice->PciIo->Mem.Read (
+ IsaIoDevice->PciIo,
+ (EFI_PCI_IO_PROTOCOL_WIDTH) Width,
+ EFI_PCI_IO_PASS_THROUGH_BAR,
+ Offset,
+ Count,
+ Buffer
+ );
+
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoMemWrite (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
+ IN UINT32 Offset,
+ IN UINTN Count,
+ IN OUT VOID *Buffer
+ )
+/*++
+
+Routine Description:
+
+ Performs an ISA Memory Write Cycle
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Width - Signifies the width of the memory operation.
+ Offset - The offset in ISA memory space to start the memory operation.
+ Count - The number of memory operations to perform.
+ Buffer - The source buffer to write data from
+
+Returns:
+
+ EFI_SUCCESS - The data was written to the device sucessfully.
+ EFI_UNSUPPORTED - The Offset is not valid for this device.
+ EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
+ EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
+
+--*/
+{
+ EFI_STATUS Status;
+ ISA_IO_DEVICE *IsaIoDevice;
+
+ //
+ // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for
+ // ISA Bus Master.
+ //
+ // So we just return EFI_UNSUPPORTED for these functions.
+ //
+ if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
+
+ //
+ // Verify Isa IO Access
+ //
+ Status = IsaIoVerifyAccess (
+ IsaIoDevice,
+ IsaAccessTypeMem,
+ Width,
+ Count,
+ &Offset
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Call PciIo->Mem.Write
+ //
+ Status = IsaIoDevice->PciIo->Mem.Write (
+ IsaIoDevice->PciIo,
+ (EFI_PCI_IO_PROTOCOL_WIDTH) Width,
+ EFI_PCI_IO_PASS_THROUGH_BAR,
+ Offset,
+ Count,
+ Buffer
+ );
+
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoCopyMem (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
+ IN UINT32 DestOffset,
+ IN UINT32 SrcOffset,
+ IN UINTN Count
+ )
+/*++
+
+Routine Description:
+
+ Performs an ISA I/O Copy Memory
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Width - Signifies the width of the memory copy operation.
+ DestOffset - The offset of the destination
+ SrcOffset - The offset of the source
+ Count - The number of memory copy operations to perform
+
+Returns:
+
+ EFI_SUCCESS - The data was copied sucessfully.
+ EFI_UNSUPPORTED - The DestOffset or SrcOffset is not valid for this device.
+ EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
+ EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
+
+--*/
+{
+ EFI_STATUS Status;
+ ISA_IO_DEVICE *IsaIoDevice;
+
+ //
+ // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for
+ // ISA Bus Master.
+ //
+ // So we just return EFI_UNSUPPORTED for these functions.
+ //
+ if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
+
+ //
+ // Verify Isa IO Access for destination and source
+ //
+ Status = IsaIoVerifyAccess (
+ IsaIoDevice,
+ IsaAccessTypeMem,
+ Width,
+ Count,
+ &DestOffset
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = IsaIoVerifyAccess (
+ IsaIoDevice,
+ IsaAccessTypeMem,
+ Width,
+ Count,
+ &SrcOffset
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Call PciIo->CopyMem
+ //
+ Status = IsaIoDevice->PciIo->CopyMem (
+ IsaIoDevice->PciIo,
+ (EFI_PCI_IO_PROTOCOL_WIDTH) Width,
+ EFI_PCI_IO_PASS_THROUGH_BAR,
+ DestOffset,
+ EFI_PCI_IO_PASS_THROUGH_BAR,
+ SrcOffset,
+ Count
+ );
+
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ }
+
+ return Status;
+}
+
+STATIC
+EFI_STATUS
+IsaIoMap_OnlySupportSlaveReadWrite (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,
+ IN UINT8 ChannelNumber OPTIONAL,
+ IN UINT32 ChannelAttributes,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ )
+/*++
+
+Routine Description:
+
+ Maps a memory region for DMA, note this implementation
+ only supports slave read/write operation to save code size.
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Operation - Indicates the type of DMA (slave or bus master), and if
+ the DMA operation is going to read or write to system memory.
+ ChannelNumber - The slave channel number to use for this DMA operation.
+ If Operation and ChannelAttributes shows that this device
+ performs bus mastering DMA, then this field is ignored.
+ The legal range for this field is 0..7.
+ ChannelAttributes - The attributes of the DMA channel to use for this DMA operation
+ HostAddress - The system memory address to map to the device.
+ NumberOfBytes - On input the number of bytes to map. On output the number
+ of bytes that were mapped.
+ DeviceAddress - The resulting map address for the bus master device to use
+ to access the hosts HostAddress.
+ Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().
+
+Returns:
+
+ EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.
+ EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.
+ EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.
+ EFI_DEVICE_ERROR - The system hardware could not map the requested address.
+ EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_PHYSICAL_ADDRESS PhysicalAddress;
+ ISA_MAP_INFO *IsaMapInfo;
+ UINT8 DmaMode;
+ UINTN MaxNumberOfBytes;
+ UINT32 BaseAddress;
+ UINT16 Count;
+
+ UINT8 DmaMask;
+ UINT8 DmaClear;
+ UINT8 DmaChannelMode;
+
+ if ((NULL == This) ||
+ (NULL == HostAddress) ||
+ (NULL == NumberOfBytes) ||
+ (NULL == DeviceAddress) ||
+ (NULL == Mapping)
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+
+ //
+ // Initialize the return values to their defaults
+ //
+ *Mapping = NULL;
+
+ //
+ // Make sure the Operation parameter is valid.
+ // Light IsaIo only supports two operations.
+ //
+ if (!(Operation == EfiIsaIoOperationSlaveRead ||
+ Operation == EfiIsaIoOperationSlaveWrite)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (ChannelNumber >= 4) {
+ //
+ // The Light IsaIo doesn't support channelNumber larger than 4.
+ //
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Map the HostAddress to a DeviceAddress.
+ //
+ PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
+ if ((PhysicalAddress +*NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {
+ //
+ // Common Buffer operations can not be remapped. If the common buffer
+ // is above 16MB, then it is not possible to generate a mapping, so return
+ // an error.
+ //
+ if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()
+ // is called later.
+ //
+ IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));
+ if (IsaMapInfo == NULL) {
+ *NumberOfBytes = 0;
+ return EFI_OUT_OF_RESOURCES;
+ }
+ //
+ // Return a pointer to the MAP_INFO structure in Mapping
+ //
+ *Mapping = IsaMapInfo;
+
+ //
+ // Initialize the MAP_INFO structure
+ //
+ IsaMapInfo->Operation = Operation;
+ IsaMapInfo->NumberOfBytes = *NumberOfBytes;
+ IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);
+ IsaMapInfo->HostAddress = PhysicalAddress;
+ IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;
+
+ //
+ // Allocate a buffer below 16MB to map the transfer to.
+ //
+ Status = gBS->AllocatePages (
+ AllocateMaxAddress,
+ EfiBootServicesData,
+ IsaMapInfo->NumberOfPages,
+ &IsaMapInfo->MappedHostAddress
+ );
+ if (EFI_ERROR (Status)) {
+ gBS->FreePool (IsaMapInfo);
+ *NumberOfBytes = 0;
+ *Mapping = NULL;
+ return Status;
+ }
+ //
+ // If this is a read operation from the DMA agents's point of view,
+ // then copy the contents of the real buffer into the mapped buffer
+ // so the DMA agent can read the contents of the real buffer.
+ //
+ if (Operation == EfiIsaIoOperationSlaveRead) {
+ CopyMem (
+ (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,
+ (VOID *) (UINTN) IsaMapInfo->HostAddress,
+ IsaMapInfo->NumberOfBytes
+ );
+ }
+ //
+ // The DeviceAddress is the address of the maped buffer below 16 MB
+ //
+ *DeviceAddress = IsaMapInfo->MappedHostAddress;
+ } else {
+ //
+ // The transfer is below 16 MB, so the DeviceAddress is simply the
+ // HostAddress
+ //
+ *DeviceAddress = PhysicalAddress;
+ }
+
+ //
+ // Figure out what to program into the DMA Channel Mode Register
+ //
+ DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));
+ if (Operation == EfiIsaIoOperationSlaveRead) {
+ DmaMode |= V_8237_DMA_CHMODE_MEM2IO;
+ } else {
+ DmaMode |= V_8237_DMA_CHMODE_IO2MEM;
+ }
+ //
+ // We only support EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE in simplified IsaIo
+ //
+ DmaMode |= V_8237_DMA_CHMODE_SINGLE;
+
+ //
+ // A Slave DMA transfer can not cross a 64K boundary.
+ // Compute *NumberOfBytes based on this restriction.
+ //
+ MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);
+ if (*NumberOfBytes > MaxNumberOfBytes) {
+ *NumberOfBytes = MaxNumberOfBytes;
+ }
+ //
+ // Compute the values to program into the BaseAddress and Count registers
+ // of the Slave DMA controller
+ //
+ BaseAddress = (UINT32) (*DeviceAddress);
+ Count = (UINT16) (*NumberOfBytes - 1);
+ //
+ // Program the DMA Write Single Mask Register for ChannelNumber
+ // Clear the DMA Byte Pointer Register
+ //
+ DmaMask = R_8237_DMA_WRSMSK_CH0_3;
+ DmaClear = R_8237_DMA_CBPR_CH0_3;
+ DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;
+
+ Status = WritePort (
+ This,
+ DmaMask,
+ (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (
+ This,
+ DmaClear,
+ (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (This, DmaChannelMode, DmaMode);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WriteDmaPort (
+ This,
+ DmaRegisters[ChannelNumber].Address,
+ DmaRegisters[ChannelNumber].Page,
+ DmaRegisters[ChannelNumber].Count,
+ BaseAddress,
+ Count
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (
+ This,
+ DmaMask,
+ (UINT8) (ChannelNumber & 0x03)
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
+
+STATIC
+EFI_STATUS
+IsaIoMap_FullSupport (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,
+ IN UINT8 ChannelNumber OPTIONAL,
+ IN UINT32 ChannelAttributes,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ )
+/*++
+
+Routine Description:
+
+ Maps a memory region for DMA. This implementation implement the
+ the full mapping support.
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Operation - Indicates the type of DMA (slave or bus master), and if
+ the DMA operation is going to read or write to system memory.
+ ChannelNumber - The slave channel number to use for this DMA operation.
+ If Operation and ChannelAttributes shows that this device
+ performs bus mastering DMA, then this field is ignored.
+ The legal range for this field is 0..7.
+ ChannelAttributes - The attributes of the DMA channel to use for this DMA operation
+ HostAddress - The system memory address to map to the device.
+ NumberOfBytes - On input the number of bytes to map. On output the number
+ of bytes that were mapped.
+ DeviceAddress - The resulting map address for the bus master device to use
+ - to access the hosts HostAddress.
+ Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().
+
+Returns:
+
+ EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.
+ EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.
+ EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.
+ EFI_DEVICE_ERROR - The system hardware could not map the requested address.
+ EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
+
+--*/
+{
+ EFI_STATUS Status;
+ BOOLEAN Master;
+ BOOLEAN Read;
+ EFI_PHYSICAL_ADDRESS PhysicalAddress;
+ ISA_MAP_INFO *IsaMapInfo;
+ UINT8 DmaMode;
+ UINTN MaxNumberOfBytes;
+ UINT32 BaseAddress;
+ UINT16 Count;
+
+ UINT8 DmaMask;
+ UINT8 DmaClear;
+ UINT8 DmaChannelMode;
+
+ if ((NULL == This) ||
+ (NULL == HostAddress) ||
+ (NULL == NumberOfBytes) ||
+ (NULL == DeviceAddress) ||
+ (NULL == Mapping)
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+
+ //
+ // Initialize the return values to their defaults
+ //
+ *Mapping = NULL;
+
+ //
+ // Make sure the Operation parameter is valid
+ //
+ if (Operation < 0 || Operation >= EfiIsaIoOperationMaximum) {
+ return EFI_INVALID_PARAMETER;
+ }
+ //
+ // See if this is a Slave DMA Operation
+ //
+ Master = TRUE;
+ Read = FALSE;
+ if (Operation == EfiIsaIoOperationSlaveRead) {
+ Operation = EfiIsaIoOperationBusMasterRead;
+ Master = FALSE;
+ Read = TRUE;
+ }
+
+ if (Operation == EfiIsaIoOperationSlaveWrite) {
+ Operation = EfiIsaIoOperationBusMasterWrite;
+ Master = FALSE;
+ Read = FALSE;
+ }
+
+ if (!Master) {
+ //
+ // Make sure that ChannelNumber is a valid channel number
+ // Channel 4 is used to cascade, so it is illegal.
+ //
+ if (ChannelNumber == 4 || ChannelNumber > 7) {
+ return EFI_INVALID_PARAMETER;
+ }
+ //
+ // This implementation only support COMPATIBLE DMA Transfers
+ //
+ if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_COMPATIBLE)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (ChannelAttributes &
+ (
+ EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_A |
+ EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_B |
+ EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_C
+ )
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (ChannelNumber < 4) {
+ //
+ // If this is Channel 0..3, then the width must be 8 bit
+ //
+ if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||
+ (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16)
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+ } else {
+ //
+ // If this is Channel 4..7, then the width must be 16 bit
+ //
+ if ((ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||
+ (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16))
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+ }
+ //
+ // Either Demand Mode or Single Mode must be selected, but not both
+ //
+ if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {
+ if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {
+ return EFI_INVALID_PARAMETER;
+ }
+ } else {
+ if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE)) {
+ return EFI_INVALID_PARAMETER;
+ }
+ }
+ }
+ //
+ // Map the HostAddress to a DeviceAddress.
+ //
+ PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
+ if ((PhysicalAddress +*NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {
+ //
+ // Common Buffer operations can not be remapped. If the common buffer
+ // is above 16MB, then it is not possible to generate a mapping, so return
+ // an error.
+ //
+ if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()
+ // is called later.
+ //
+ IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));
+ if (IsaMapInfo == NULL) {
+ *NumberOfBytes = 0;
+ return EFI_OUT_OF_RESOURCES;
+ }
+ //
+ // Return a pointer to the MAP_INFO structure in Mapping
+ //
+ *Mapping = IsaMapInfo;
+
+ //
+ // Initialize the MAP_INFO structure
+ //
+ IsaMapInfo->Operation = Operation;
+ IsaMapInfo->NumberOfBytes = *NumberOfBytes;
+ IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);
+ IsaMapInfo->HostAddress = PhysicalAddress;
+ IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;
+
+ //
+ // Allocate a buffer below 16MB to map the transfer to.
+ //
+ Status = gBS->AllocatePages (
+ AllocateMaxAddress,
+ EfiBootServicesData,
+ IsaMapInfo->NumberOfPages,
+ &IsaMapInfo->MappedHostAddress
+ );
+ if (EFI_ERROR (Status)) {
+ gBS->FreePool (IsaMapInfo);
+ *NumberOfBytes = 0;
+ *Mapping = NULL;
+ return Status;
+ }
+ //
+ // If this is a read operation from the DMA agents's point of view,
+ // then copy the contents of the real buffer into the mapped buffer
+ // so the DMA agent can read the contents of the real buffer.
+ //
+ if (Operation == EfiIsaIoOperationBusMasterRead) {
+ CopyMem (
+ (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,
+ (VOID *) (UINTN) IsaMapInfo->HostAddress,
+ IsaMapInfo->NumberOfBytes
+ );
+ }
+ //
+ // The DeviceAddress is the address of the maped buffer below 16 MB
+ //
+ *DeviceAddress = IsaMapInfo->MappedHostAddress;
+ } else {
+ //
+ // The transfer is below 16 MB, so the DeviceAddress is simply the
+ // HostAddress
+ //
+ *DeviceAddress = PhysicalAddress;
+ }
+ //
+ // If this is a Bus Master operation then return
+ //
+ if (Master) {
+ return EFI_SUCCESS;
+ }
+ //
+ // Figure out what to program into the DMA Channel Mode Register
+ //
+ DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));
+ if (Read) {
+ DmaMode |= V_8237_DMA_CHMODE_MEM2IO;
+ } else {
+ DmaMode |= V_8237_DMA_CHMODE_IO2MEM;
+ }
+
+ if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_AUTO_INITIALIZE) {
+ DmaMode |= B_8237_DMA_CHMODE_AE;
+ }
+
+ if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {
+ DmaMode |= V_8237_DMA_CHMODE_DEMAND;
+ }
+
+ if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {
+ DmaMode |= V_8237_DMA_CHMODE_SINGLE;
+ }
+ //
+ // A Slave DMA transfer can not cross a 64K boundary.
+ // Compute *NumberOfBytes based on this restriction.
+ //
+ MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);
+ if (*NumberOfBytes > MaxNumberOfBytes) {
+ *NumberOfBytes = MaxNumberOfBytes;
+ }
+ //
+ // Compute the values to program into the BaseAddress and Count registers
+ // of the Slave DMA controller
+ //
+ if (ChannelNumber < 4) {
+ BaseAddress = (UINT32) (*DeviceAddress);
+ Count = (UINT16) (*NumberOfBytes - 1);
+ } else {
+ BaseAddress = (UINT32) (((UINT32) (*DeviceAddress) & 0xff0000) | (((UINT32) (*DeviceAddress) & 0xffff) >> 1));
+ Count = (UINT16) ((*NumberOfBytes - 1) >> 1);
+ }
+ //
+ // Program the DMA Write Single Mask Register for ChannelNumber
+ // Clear the DMA Byte Pointer Register
+ //
+ if (ChannelNumber < 4) {
+ DmaMask = R_8237_DMA_WRSMSK_CH0_3;
+ DmaClear = R_8237_DMA_CBPR_CH0_3;
+ DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;
+ } else {
+ DmaMask = R_8237_DMA_WRSMSK_CH4_7;
+ DmaClear = R_8237_DMA_CBPR_CH4_7;
+ DmaChannelMode = R_8237_DMA_CHMODE_CH4_7;
+ }
+
+ Status = WritePort (
+ This,
+ DmaMask,
+ (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (
+ This,
+ DmaClear,
+ (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (This, DmaChannelMode, DmaMode);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WriteDmaPort (
+ This,
+ DmaRegisters[ChannelNumber].Address,
+ DmaRegisters[ChannelNumber].Page,
+ DmaRegisters[ChannelNumber].Count,
+ BaseAddress,
+ Count
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = WritePort (
+ This,
+ DmaMask,
+ (UINT8) (ChannelNumber & 0x03)
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoMap (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,
+ IN UINT8 ChannelNumber OPTIONAL,
+ IN UINT32 ChannelAttributes,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ )
+/*++
+
+Routine Description:
+
+ Maps a memory region for DMA
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Operation - Indicates the type of DMA (slave or bus master), and if
+ the DMA operation is going to read or write to system memory.
+ ChannelNumber - The slave channel number to use for this DMA operation.
+ If Operation and ChannelAttributes shows that this device
+ performs bus mastering DMA, then this field is ignored.
+ The legal range for this field is 0..7.
+ ChannelAttributes - The attributes of the DMA channel to use for this DMA operation
+ HostAddress - The system memory address to map to the device.
+ NumberOfBytes - On input the number of bytes to map. On output the number
+ of bytes that were mapped.
+ DeviceAddress - The resulting map address for the bus master device to use
+ - to access the hosts HostAddress.
+ Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().
+
+Returns:
+
+ EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.
+ EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.
+ EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.
+ EFI_DEVICE_ERROR - The system hardware could not map the requested address.
+ EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
+
+--*/
+{
+ //
+ // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.
+ //
+ if (!FeaturePcdGet (PcdIsaBusSupportDma)) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for
+ // ISA Bus Master.
+ //
+ // So we just return EFI_UNSUPPORTED for these functions.
+ //
+ if (FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {
+ return IsaIoMap_OnlySupportSlaveReadWrite (
+ This,
+ Operation,
+ ChannelNumber,
+ ChannelAttributes,
+ HostAddress,
+ NumberOfBytes,
+ DeviceAddress,
+ Mapping
+ );
+
+ } else {
+ return IsaIoMap_FullSupport (
+ This,
+ Operation,
+ ChannelNumber,
+ ChannelAttributes,
+ HostAddress,
+ NumberOfBytes,
+ DeviceAddress,
+ Mapping
+ );
+ }
+}
+EFI_STATUS
+EFIAPI
+IsaIoAllocateBuffer (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN EFI_ALLOCATE_TYPE Type,
+ IN EFI_MEMORY_TYPE MemoryType,
+ IN UINTN Pages,
+ OUT VOID **HostAddress,
+ IN UINT64 Attributes
+ )
+/*++
+
+Routine Description:
+
+ Allocates a common buffer for DMA
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Type - The type allocation to perform.
+ MemoryType - The type of memory to allocate.
+ Pages - The number of pages to allocate.
+ HostAddress - A pointer to store the base address of the allocated range.
+ Attributes - The requested bit mask of attributes for the allocated range.
+
+Returns:
+
+ EFI_SUCCESS - The requested memory pages were allocated.
+ EFI_INVALID_PARAMETER - Type is invalid or MemoryType is invalid or HostAddress is NULL
+ EFI_UNSUPPORTED - Attributes is unsupported or the memory range specified
+ by HostAddress, Pages, and Type is not available for common buffer use.
+ EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_PHYSICAL_ADDRESS PhysicalAddress;
+
+ //
+ // Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for
+ // ISA Bus Master.
+ // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.
+ //
+ if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if (HostAddress == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Type < AllocateAnyPages || Type >= MaxAllocateType) {
+ return EFI_INVALID_PARAMETER;
+ }
+ //
+ // The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData
+ //
+ if (MemoryType != EfiBootServicesData && MemoryType != EfiRuntimeServicesData) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Attributes &~(EFI_ISA_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE | EFI_ISA_IO_ATTRIBUTE_MEMORY_CACHED)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) (ISA_MAX_MEMORY_ADDRESS - 1);
+ if (Type == AllocateAddress) {
+ if ((UINTN) (*HostAddress) >= ISA_MAX_MEMORY_ADDRESS) {
+ return EFI_UNSUPPORTED;
+ } else {
+ PhysicalAddress = (UINTN) (*HostAddress);
+ }
+ }
+
+ if (Type == AllocateAnyPages) {
+ Type = AllocateMaxAddress;
+ }
+
+ Status = gBS->AllocatePages (Type, MemoryType, Pages, &PhysicalAddress);
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ return Status;
+ }
+
+ *HostAddress = (VOID *) (UINTN) PhysicalAddress;
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+IsaIoFreeBuffer (
+ IN EFI_ISA_IO_PROTOCOL *This,
+ IN UINTN Pages,
+ IN VOID *HostAddress
+ )
+/*++
+
+Routine Description:
+
+ Frees a common buffer
+
+Arguments:
+
+ This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
+ Pages - The number of pages to free.
+ HostAddress - The base address of the allocated range.
+
+Returns:
+
+ EFI_SUCCESS - The requested memory pages were freed.
+ EFI_INVALID_PARAMETER - The memory was not allocated with EFI_ISA_IO.AllocateBufer().
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_PHYSICAL_ADDRESS PhysicalAddress;
+
+ //
+ // Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for
+ // ISA Bus Master.
+ // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.
+ //
+ if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
+ Status = gBS->FreePages (
+ PhysicalAddress,
+ Pages
+ );
+ if (EFI_ERROR (Status)) {
+ ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
+ }
+
+ return Status;
+}
+
|